Polarographic determination of tert-butylhydroquinone in micellar and emulsified media

✍ Scribed by A.González Cortés; A.J.Reviejo García; P. Yáñez-Sedeño; J.M. Pingarrón

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 680 KB
• Volume: 273
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)80201-u

✦ Synopsis

A polarographlc study of the oxldatlon of tert-butylhydroqumone (TBHQ) m nucellar and emukufied me&a IS described The non-loruc surfactant Pluromc F-68, m Button-Robmson buffer (pH 9 O), was found to be the most sudable for determmmg tlus antloxldant 111 nucellar solutions The charactenstics of the oxldatlon process were estabbshed Lmear cabbratron graphs were obtamed for TBHQ by ddferentlal-pulse polarography (DPP) wrthm the ranges 10 x 10e6-1 0 X 10m5 and 10 x 1O-5-1 0 X 10m4 mol 1-l Hrlth a llrmt of determmation (10 X standard devlafion) of 6 7 x lo-' mol I-' TBHQ (0 11 mg 1-l) An emulsified medmm formed anth a nuxture of hexane and ethyl acetate (99 1) at pH 8 0 was also used Lmear cabbration graphs were obtamed by DPP urlthm the ranges 10 x 10v6-1 0 x lo-' mol 1-l and 10 x 10-'-l 0 X 10e4 mol I-' TBHQ The bnut of determmatlon was found to be 8 3 x lo-' mol I-' Interferences from tti-butylhydroxyamsole, tert-butylhydroxytoluene, atnc acid, propyl gallate and propylene glycol were tested Except for propyl gallate, none of them mterfered The proposed method was appbed antb good results to the determmatlon of TBHQ m spiked echble ads by duect emulskation of the samples